The death is "unexplained".
"To bring charges that are that serious? I've never heard of it before."
Police have today filed charges of manslaughter against three Police officers in the New Plymouth District Court.
Police say after they didn't respond to education or encouragement, they were closed.
The van was found partially submerged.
He says working for the police has been "a pleasure".
There were roughly 30 searches of persons of interest.
Police are trying to identify the body .
The area has been cordoned off.